2022
DOI: 10.1002/ps.7257
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Factors impacting the detection of weed seed contaminants in seed lots

Abstract: BACKGROUND The setting and following of phytosanitary standards for weed seeds can lessen the impacts of weeds on agriculture. Standards adopted by seed companies, laboratories and regulators ensure the contamination rates do not exceed some thresholds. Globally sample size standards are set based on the amount needed to obtain a contaminant in a random sample of the seed lot, not detectability. New Zealand requires a 95% confidence that the maximum pest limit of 0.01% of quarantine weed seed contamination is … Show more

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Cited by 6 publications
(2 citation statements)
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“…In our case study, we used R=1$R=1$ for all pathways, knowing that we understand well how varying this parameter would affect our solution behavior and residual risk. 4.To account for the fact that inspection can be imperfect (Buddenhagen et al., 2023), we introduce an imperfect detectability parameter (d$d$, unitless), which represents the likelihood of correctly identifying an infested unit as infested upon inspection. We thus replace the sample size in the propagule pressure equation (Equation ) with its effective sample size n×d$n \times d$ (Trouve et al., 2022).…”
Section: Discussionmentioning
confidence: 99%
“…In our case study, we used R=1$R=1$ for all pathways, knowing that we understand well how varying this parameter would affect our solution behavior and residual risk. 4.To account for the fact that inspection can be imperfect (Buddenhagen et al., 2023), we introduce an imperfect detectability parameter (d$d$, unitless), which represents the likelihood of correctly identifying an infested unit as infested upon inspection. We thus replace the sample size in the propagule pressure equation (Equation ) with its effective sample size n×d$n \times d$ (Trouve et al., 2022).…”
Section: Discussionmentioning
confidence: 99%
“…Our study provides key developments on this front: by incorporating genomic data into the established and commonly used ENM framework, we show how managers can identify the most concerning sources of an invasive species. This information will allow them to implement strategies like increasing the screening of goods coming from specific regions (Buddenhagen et al., 2023 ) or preventing imports from areas containing genetic variation of high concern.…”
Section: Discussionmentioning
confidence: 99%